im deciding with focal access 165 a1 components or infinity kappa 60.9cs im mainly looking for sound quality. please any help is thanked.. and i tend to crank the music up pretty high...

currently running
pioneer f90bt
kicker 350.2 amp.
boston g3 10"
and a kenwood 4 channel amp.

 

Focals, but they ain't cheap and your 4 channel needs to be upgraded.

 

^ no where near cheap, and why kappa's not perfects

 

If you read correctly I said the focals are not cheap.

 

I have the Focal 165A1's in the front doors in my 2011 xB. They are incredible!! My last car had a Ellipse/Boston Acoustics system in it. The Focal are MUCH better. Check out Focal's parent Co., Focal JM Lab. They make some of the finest, audiophile quality speakers in the world. The 165 CA1's make a perfect speaker for the rear doors.

 

Agreed Focal are some of the best after market car speakers you can buy definitely "flying first class". But for most car audio applications it maybe overkill especially if your not going to complete the process. . . Sound dampening, a quality amp and subwoofer. Most of us wouldn't be able to tell the difference between Kappas and Focals especially traveling at 70mph down the road.
Just my .02 cents.